Section 2.1 What is Matter?

List the two types of pure substances

1. elements 2. compounds

Name two examples of mixtures

1. grape juice 2. air

Name two examples of pure substances

1. water 2. salt

What is the chemical formula for water

H20

Why is light not matter

Light does not have mass or volume

mixture

a combination of more than one pure substance

compound

a substance made of atoms of more than one element bound together

element

a substance that cannot be broken down into simpler substances

pure substance

any matter that has a fixed compostion and definite properties

matter

anything that has mass and occupies space.

heterogenous mixture

combination of substances in which the particles are not uniformly distributed and are large enough to be seen easily

miscible

describes two or more liquids that are able to dissolve into each other in various proportions

immiscible

describes two or more liquids that do not mix into each other

chemical formula

the chemical symbols and numbers indicating the atoms contained in the basic unit of a substance

atom

the smallest particle that has the properties of an element

molecule

the smallest unit of a substance that exhibits all of the properties characteristic of that substance

chemistry

the study of matter and how it changes

homogeneous mixture

well mixed, same throughout, cannot see particles